IBM 92296GU User Guide - Page 63

Installing, memory, modules

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Installing memory modules The following notes describe the types of DIMMs that the computer supports and other information that you must consider when you install DIMMs: v When you restart the computer after you add or remove a DIMM, the computer displays a message that the memory configuration has changed. v The computer uses industry-standard PC2-5300 double-data-rate 2 (DDR2) DIMMs. v The system board contains four DIMM connectors and supports two-way memory interleaving. v The optional DIMMs that are available for the computer are 512 MB, 1 GB, and 2 GB memory modules. When you order 1 GB and 2 GB DIMM options, they come in pairs. The computer supports a minimum of 512 MB of memory and a maximum of 8 GB of memory. v The computer comes with either two 512 MB or two 1 GB DIMMs installed in the DIMM 1 and DIMM 3 connectors. The second pair of DIMMs must be installed in the DIMM 2 and DIMM 4 connectors. v DIMMs must be installed in matched pairs. The DIMMs in each pair must be the same size, speed, type, and technology as each other but do not have to match the other pairs. You can mix compatible DIMMs from various manufacturers. v Install only 1.8 V, 240-pin, DDR2, PC2-5300, 667 MHz, unbuffered synchronous dynamic random-access memory (SDRAM) with error correcting code (ECC) DIMMs. These DIMMs must be compatible with the latest PC2-5300 SDRAM, unbuffered DIMM specification. For a list of supported optional devices for the computer, see http://www.ibm.com/servers/eserver/serverproven/compat/us/. v The amount of usable memory will be reduced depending on the system configuration. A certain amount of memory must be reserved for system resources. The system summary in the Configuration/Setup Utility program displays the total amount of installed memory and the amount of configured memory. To install a DIMM, complete the following steps: 1. Read the safety information that begins on page v, and the"Installation guidelines" on page 29. 2. Turn off the computer and all attached devices (see "Turning off the computer" on page 19); then, disconnect all power cords and external cables. 3. Remove the side cover (see "Removing the side cover" on page 35). 4. Remove the bezel (see "Removing the bezel" on page 36). 5. For easier access, place the computer on its side. 6. Remove the internal drive-bay bracket (see "Removing the internal drive-bay bracket" on page 37). 7. Locate the DIMM connectors on the system board. Determine the connectors into which you will install the DIMMs. Remember that DIMM 1 and DIMM 3 must be paired together (and must be the first installed pair) and DIMM 2 and DIMM 4 must be paired together. The following table shows the DIMM installation sequence. Memory installation sequence DIMMs 2 DIMMs 4 DIMMs Connectors 1, 3 1, 3, 2, 4 Chapter 4. Installing optional devices 51

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Installing
memory
modules
The
following
notes
describe
the
types
of
DIMMs
that
the
computer
supports
and
other
information
that
you
must
consider
when
you
install
DIMMs:
v
When
you
restart
the
computer
after
you
add
or
remove
a
DIMM,
the
computer
displays
a
message
that
the
memory
configuration
has
changed.
v
The
computer
uses
industry-standard
PC2-5300
double-data-rate
2
(DDR2)
DIMMs.
v
The
system
board
contains
four
DIMM
connectors
and
supports
two-way
memory
interleaving.
v
The
optional
DIMMs
that
are
available
for
the
computer
are
512
MB,
1
GB,
and
2
GB
memory
modules.
When
you
order
1
GB
and
2
GB
DIMM
options,
they
come
in
pairs.
The
computer
supports
a
minimum
of
512
MB
of
memory
and
a
maximum
of
8
GB
of
memory.
v
The
computer
comes
with
either
two
512
MB
or
two
1
GB
DIMMs
installed
in
the
DIMM
1
and
DIMM
3
connectors.
The
second
pair
of
DIMMs
must
be
installed
in
the
DIMM
2
and
DIMM
4
connectors.
v
DIMMs
must
be
installed
in
matched
pairs.
The
DIMMs
in
each
pair
must
be
the
same
size,
speed,
type,
and
technology
as
each
other
but
do
not
have
to
match
the
other
pairs.
You
can
mix
compatible
DIMMs
from
various
manufacturers.
v
Install
only
1.8
V,
240-pin,
DDR2,
PC2-5300,
667
MHz,
unbuffered
synchronous
dynamic
random-access
memory
(SDRAM)
with
error
correcting
code
(ECC)
DIMMs.
These
DIMMs
must
be
compatible
with
the
latest
PC2-5300
SDRAM,
unbuffered
DIMM
specification.
For
a
list
of
supported
optional
devices
for
the
computer,
see
v
The
amount
of
usable
memory
will
be
reduced
depending
on
the
system
configuration.
A
certain
amount
of
memory
must
be
reserved
for
system
resources.
The
system
summary
in
the
Configuration/Setup
Utility
program
displays
the
total
amount
of
installed
memory
and
the
amount
of
configured
memory.
To
install
a
DIMM,
complete
the
following
steps:
1.
Read
the
safety
information
that
begins
on
page
v,
and
the“Installation
guidelines”
on
page
29.
2.
Turn
off
the
computer
and
all
attached
devices
(see
“Turning
off
the
computer”
on
page
19);
then,
disconnect
all
power
cords
and
external
cables.
3.
Remove
the
side
cover
(see
“Removing
the
side
cover”
on
page
35).
4.
Remove
the
bezel
(see
“Removing
the
bezel”
on
page
36).
5.
For
easier
access,
place
the
computer
on
its
side.
6.
Remove
the
internal
drive-bay
bracket
(see
“Removing
the
internal
drive-bay
bracket”
on
page
37).
7.
Locate
the
DIMM
connectors
on
the
system
board.
Determine
the
connectors
into
which
you
will
install
the
DIMMs.
Remember
that
DIMM
1
and
DIMM
3
must
be
paired
together
(and
must
be
the
first
installed
pair)
and
DIMM
2
and
DIMM
4
must
be
paired
together.
The
following
table
shows
the
DIMM
installation
sequence.
Memory
installation
sequence
DIMMs
Connectors
2
DIMMs
1,
3
4
DIMMs
1,
3,
2,
4
Chapter
4.
Installing
optional
devices
51